Try TuxGuitar as opposed to Guitar Pro. It can use Guitar Pro tabs (Plus, I don't know if Guitar Pro can do it too, but it can add more instruments then just the guitar). Besides that, if you've got a band to go along with the guitar, there's tons of great recording, editing, and whatever else you might need software free on Linux.
I didn't read through everyone else's comments yet, but if you can't find a driver for your wireless specifically for Linux, there's a thing called ndiswrapper that will run most Windows wireless card drivers on Linux. That's what I'm using and it works great.
Oh and as for gaming, I would recommend dual booting. I don't play games as much as I used to but I still have Windows for that purpose. Plus, it's good to have the multiple operating systems on the computer. That way when you do something stupid on one (as I have done many times) you still have something that works until the other one is up and running again.
Last edited by Chronothread; 12-07-2008 at 04:13 AM.